Grain-recovery attachment for thrashing machines



1. w. BELL. GRAIN RECOVERY ATTACHMENT FOR TIIIIASHING MACHINES. APPLICATION FILED SEPT. I9. I92I.

1,412,333. Patented-1 11.11, 1922.

' awucm I03 G I'bo'm m UNITED STATES PATENT OFFICE.

LURENZO W. BELL, OF CARROLLTON, IVIISSOURI, 'ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO NATIONAL GRAEN SAVERS MISSOURI.

ASSOCIATION, 033 CARROLLTON,

GRAIN-RECOVERY-ATTACHIEENT FOR THRASHING IEACI-IINES.

on of Letters Eatent.

Patented Apr. 11, 1922.

Application filed September 19, 1921. Serial No. 501,783.

To all whom it may cancer-n:

Be it known that I, LonnNZo N. BELL, a citizenof the United States, residing at tlarrollton, in the county of Carroll and State of Missouri, have invented a certain new and useful Improvement in Grain-Recovery Attachments for Thrashing Machines, of which the following is a complete speciiication.

This invention relates to grain-recovering apparatus, and more especially to attachments for use with pneumatic stackers', and is desig red particularly as an improvement in the apparatus disclosed by United States Letters Patent No. 1366899, February 1, 1921, and my object is to produce an attachmentmore thorough and eihcient than the patented one referred to, and in which the blast of air from the pneumatic stacker tube shall, in conjunction with one or more screens, accomplish the separationof loose grain from the straw, by imparting a distinct and forcible jolt to the straw, as distinguished from the patented apparatus in which gravity alone is depended upon to insure such separation of the grain from the straw and chaif.

With the object named in view the invention consists in certain novel and useful features of construction and organization of parts as hereinafter describeo and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawing, in which:

Figure 1 is a side view of a pneumatic stacker with the device of the invention in operation thereto.

Figure 2 is an enlarged central vertical section through the invention and the end of the stacker.

Figure 3 is a section on the line III-III of lligure 1.

4i: a section on the line IVIV of 5 i. an enlarged central vertical 0i-l0ll o the delivery end of the apparatus.

In the said drawing where like reference characters identify corresponding parts in all of the figures, 1 indicates a pneumatic stacker tube of any common and well-known type. Adjustably embracing thestacker at any convenient points are a pair of clamping rings 2 which carry and secure in position on the stacker a relatively rectangular shaped chute which projects some distance eyond the end of the stacker as shown in the drawing.

Pivotcd in the end of chute 3 is a hood con'iposed of a pair of side members a and a relatively J-shaped connecting member (see Figure 2). The open side of the hood is closed by a plate 6 forming a receiving mouth '7 for the end of the hood. It will be noted that the small end of the hood projects slightly into the chute in order that no grain shall be lost as will hereinafter appear.

Journaled on a shaft 8 connecting the side: l of the hood is a fan 9 adapted to be rapidly rotated by the force of the air blast exerted by the blower of the stacker as will be readily understood, and adapted to act as a gate and prevent the dropping downward of ain and to also propel it forcefully through the hood into the chute through centrifugal force.

Secured rigidly to the rhute on the underside thereof are a pair of screens 10 and 11, composed of a series of parallel rods, the former somewhat closer together than the latter. against which the straw ejected by the stacker is adapted to be projected with lerable, force and jolt the grain from })O.: tion. when through the combined action of the air blast and the wheel 9, it will be caught and thrown through the hood and down the chute In order to provide means for adjusting the angle at which the straw shall strike the screens a pair of arms 12 are secured to the chute and depend downwardly therefrom adjacent the mouth of the staclzen and pivotally secured at their lower ends is a deflector 13 provided with a pair of sides 14:. so that the straw shall not be thrown sideways or drop directly down wardly.

I A pair of triangular shaped guards 15 are secured to the chute and hood in such a manner that there is no chance for the straw to be pitched sideways after striking the deflector as will be readily apparent by reference to the drawing.

The chute 3 tapers at its lower end as at 16 and is connected to a flexible cylindrical telescopic down chute 17, depending at its lower end into a hopper 18 carried by the thresher by means of an arm 19. Chute 17 HCCOHI- is made flexible in order that it may the modate the swing movements of stacker under operative conditions.

An inclined screen 20 of suiiiciently tine mesh to permit the somewhat heavy grain to pass through but which will prohibit the passage of the s all amount 01' light chaff and small bits of straw which may enter the hopper with the grain, is secured near the lower end of the hopper, and in order to provide means for the QSl'tLPQ oi? this straw and chafi, the hopper at the low side of the screen is formed with an opening 21, the lower margin of which is provided with a lip 22 to prevent any grain from being blown out with the chaff as will be readily understood. The recovered grain after its passage through the screen ill descend through a spout 23 into a sack or other container.

In order that the position of the hood may be adjusted to correspond with the changes in position of the stacker, a bracket 24L is secured to the upper side thereof, and pivoted to the end of said bracket is a rod leading downwardly and rearwardly and pivotally secured to a lever 26 provided with a releasable dog for engagement with the teeth of a toothed segment 27 SBx'lllOd rigidly in position on the stacker 1 by means of a clamp ring 528. .lt will be apparent that by thin mechanism, the angle of the hood be altered at will, depending upon the height of the stacker and various other con ditions, such as the weight of the straw or the force of the air blast.

It is not believed that further recapitulation of the operation of the device is neces sary other than to state that it is the heavy jolt given the straw as it is projected from the stacker against the deflector 15 and then against the screens 10 and 11 which causes the heavy grain to be loosenou trom the straw and chatl and to continue its course in substantially the same direction as when projected from the stacker. The grain be ing small in size will pass through the screens and into the openings 7 where itwill together with the tgrce of the air blast cause tan 9 to rapidly rotate. The rotation of tan 9 will be 'sulliciently rapid to throw the grain through the hood into the mouth of the chute 3 down which it will slide both under the action ot gravity and the force ot the air blast as will be readily unclestood The grain will finally fall through screen 20 while the lightstraw and eha'lii will be blown through the opening 21.

From the above description it will be ap-' parent l have produced a device of the character tiCSCl'ilDGCl, which possesses all of the features of acvantage set forth as de sirable, while 1 have described and claimed the preferred embodiment of the same, i reserv the right to maize all changes i n'operly falling within the spirit and scope of the appended claims.

I claim l. The combination with a pneumatic stacker tube, of hood projecting beyond and above the end of said tube, a chute in communication with said hood, and means interposed between said hood and tube for separating the grain from the straw.

2. The combination with a pneumatic stacker tube, of a hood projecting above and beyond the end of said tube, a chute in communication with said hood, and a ser es of rods interposed between said hood r: chute.

3. The combination with a pneumatic stacker tube, or a hood projecting above and beyond the end of tube, a chute in communication with said hood,smeans interposed between said hood and chute tor separatingthe grain from the straw, and a de ti ctor for directing the straw against said means.

4. The combination with a pneumatic stacker tube, of a chute carried by said tube, a hood pivotally carried by said chute and beyond and above the end of said tube, means interposed etween the end of said she and the hood for separating the grain i'roni the straw, a deflector for directing the straw against said separating means, and guards to prevent sidewise dislodgmentof the straw.

The combination with a pneumatic stacker tube. oi a chute carried by said tube, a hood pivotally carried by said chute above and beyond the end of said tube, a fan in said hood, and means for separating the grain from the straw interposed between said hood and. tube.

6. The combination with a pneumatic stacker tube, of a chute carried by said tube, a hood pivotally carried by said chute above and beyond the end of said tube, tan in said hood, a screen. interposed between said hood and the end or the tube, and. a deflector adapted to direct the straw projected tromithe tube against said screen.

In witness whereof I hereunto aiiix my signature.

LORENZO WV. BELL 

